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GLXCREATENEWCONTEXT(3G) OpenGL Manual GLXCREATENEWCONTEXT(3G)
NAME
glXCreateNewContext - create a new GLX rendering context
C SPECIFICATION
GLXContext glXCreateNewContext(Display * dpy, GLXFBConfig config,
int render_type, GLXContext share_list,
Bool direct);
PARAMETERS
dpy
Specifies the connection to the X server.
config
Specifies the GLXFBConfig structure with the desired attributes for
the context.
render_type
Specifies the type of the context to be created. Must be one of
GLX_RGBA_TYPE or GLX_COLOR_INDEX_TYPE.
share_list
Specifies the context with which to share display lists. NULL
indicates that no sharing is to take place.
share_list
Specifies whether rendering is to be done with a direct connection
to the graphics system if possible (True) or through the X server
(False).
DESCRIPTION
glXCreateNewContext creates a GLX rendering context and returns its
handle. This context can be used to render into GLX windows, pixmaps,
or pixel buffers. If glXCreateNewContext fails to create a rendering
context, NULL is returned.
If render_type is GLX_RGBA_TYPE, then a context that supports RGBA
rendering is created. If config is GLX_COLOR_INDEX_TYPE, then context
supporting color-index rendering is created.
If render_type is not NULL, then all display-list indexes and
definitions are shared by context render_type and by the newly created
context. An arbitrary number of contexts can share a single
display-list space. However, all rendering contexts that share a single
display-list space must themselves exist in the same address space. Two
rendering contexts share an address space if both are nondirect using
the same server, or if both are direct and owned by a single process.
Note that in the nondirect case, it is not necessary for the calling
threads to share an address space, only for their related rendering
contexts to share an address space.
If share_list is True, then a direct-rendering context is created if
the implementation supports direct rendering, if the connection is to
an X server that is local, and if a direct-rendering context is
available. (An implementation may return an indirect context when
share_list is True.) If share_list is False, then a rendering context
that renders through the X server is always created. Direct rendering
provides a performance advantage in some implementations. However,
direct-rendering contexts cannot be shared outside a single process,
and they may be unable to render to GLX pixmaps.
NOTES
glXCreateNewContext is available only if the GLX version is 1.3 or
greater.
If the GLX version is 1.1 or 1.0, the GL version must be 1.0. If the
GLX version is 1.2, then the GL version must be 1.1. If the GLX version
is 1.3, then the GL version must be 1.2.
ERRORS
NULL is returned if execution fails on the client side.
GLXBadContext is generated if render_type is not a GLX context and is
not NULL.
GLXBadFBConfig is generated if config is not a valid GLXFBConfig.
BadMatch is generated if the context to be created would not share the
address space or the screen of the context specified by render_type.
BadAlloc is generated if the server does not have enough resources to
allocate the new context.
BadValue is generated if config is not a valid visual (for example, if
a particular GLX implementation does not support it).
SEE ALSO
glXChooseFBConfig(), glXCreateContext(), glXDestroyContext(),
glXGetFBConfigs(), glXGetFBConfigAttrib(), glXIsDirect(),
glXMakeContextCurrent()
COPYRIGHT
Copyright © 1991-2006 Silicon Graphics, Inc. This document is licensed
under the SGI Free Software B License. For details, see
http://oss.sgi.com/projects/FreeB/.
AUTHORS
opengl.org
opengl.org 03/16/2013 GLXCREATENEWCONTEXT(3G)
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